<html>
<head>
	<meta charset="utf-8">
	<title></title>
	<style type="text/css">
		.box{
			width: 1080px;
			margin:auto;
		}
		.header{
			width: 100%;
			height: 40px;
			background-color: orange;
		}
		.main{
			width: 100%;
		}
		.left{
			width: 50%;
			height:200px;
			background-color: pink;
			float: left;
		}
		.right{
			width: 50%;
			height: 250px;
			float: left;
			background-color: yellow;
		}
		.footer{
			width: 100%;
			height: 80px;
			float: left;
			background-color: tomato;
		}
	</style>
</head>
	<div class="box">
		<div class="header"></div>
		<div class="main">
			<div class="left"></div>
			<div class="right"></div>
		</div>
		<div class="footer"></div>
	</div>
</html>